Simple Socket Example

Simple Socket Example

1.服务端

import  java.io.DataOutputStream;
import  java.io.IOException;
import  java.net.ServerSocket;
import  java.net.Socket;

/** */ /**
 * Socket服务端程序
 * 
 *  @author  zJun
 * 
  */
public   class  Server  {

     private  ServerSocket server;

     private  DataOutputStream output;

     private  Socket socket;

     public  Server()  {
         try   {
             //  在端口5000建立服务
            server  =   new  ServerSocket( 5000 );
            System.out.println( " 服务创建. " );
            System.out.println( " 等待客户端连接 " );
            socket  =  server.accept();
            System.out.println( " 客户端已连接.\n关闭! " );
            output  =   new  DataOutputStream(socket.getOutputStream());
            output.writeUTF( " 欢迎你.再见! " );
            output.close();
            server.close();
        }   catch  (IOException e)  {
            e.printStackTrace();
            System.exit( 1 );
        }
    }

     public   static   void  main(String args[])  {
        Server game  =   new  Server();
    }

}

2.客户端

import  java.io.DataInputStream;
import  java.io.IOException;
import  java.net.InetAddress;
import  java.net.Socket;
import  java.net.UnknownHostException;

public   class  Client  {
     private  Socket client;

     private  DataInputStream input;

     public  Client(String server,  int  port)  {
         try   {
             //  连接服务
             if  (server.equals( " localhost " ))  {
                client  =   new  Socket(InetAddress.getLocalHost(), port);
            }   else   {
                client  =   new  Socket(InetAddress.getByName(server), port);
            }
             //  从服务器读取信息
            input  =   new  DataInputStream(client.getInputStream());
            String info  =  input.readUTF();
            System.out.println(info);
             //  关闭连接
            client.close();
        }   catch  (UnknownHostException e)  {
            e.printStackTrace();
        }   catch  (IOException e)  {
            e.printStackTrace();
        }
    }

     public   static   void  main(String[] args)  {
        Client client  =   new  Client( " localhost " ,  5000 );
    }
}